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36 59 36 60 36 61 36 62 36 63 36 64 36 65 36 66 36 67 36 68 36 69 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979

= Free Coordinate    = Occupied(Single Region)     = Occupied (Var Region)     = Center of the grid